Kate is so much prettier than Rose; if he actually did that, I wouldn’t understand that at all. But it just a rumor.
I’ve always read that William is very close to Kate’s parents so it doesn’t seem that he would mess around on Kate. I can’t imagine that he would have an affair and it would certainly delight Meghan. The articles that I read mentioned that it was well known in their aristocratic circles. He’s an absolute fool if this is true.